Budgies usually live to be six to nine years old, but there are reports of some living to be twenty years of age.
The egg of the hummingbird is the world's smallest bird's egg while the ostrich egg is the largest.
Birds are unable to sweat, so up to three-quarters of the air a bird breathes is used just for cooling down.
Cher Ami, a homing pigeon who lost an eye and a leg while carrying a message during World War I, was awarded the Distinguished Service Cross. Its leg was replaced with a wooden leg.
There are more chickens than people in the world.
African Grey parrots have been known to have vocabularies of over 200 words, and one is listed in the Guinness Book of World Records as having a vocabulary of over 1000 words.